![Anti-Vacuum feature on FlowPlumb waste traps](https://flowplumb.com/news/wp-content/uploads/2018/05/1-336x200.png)
Anti-Vacuum feature on FlowPlumb waste traps
Traps are used beneath basins to prevent foul air from re-entering the room via the basin drain and the FlowPlumb range includes both bottle traps for bathroom basins and traditional P-traps for kitchen sinks. However, FlowPlumb traps also have the option of an anti-vacuum feature. This device, which sits on top of the outlet (shown